Home / 13,199.40-18,205.70-8,479.13

Finding the Fourth Proportional to 13,199.40, 18,205.70 and 8,479.13

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Solution

The fourth proportional to 13,199.40, 18,205.70 and 8,479.13 is: 11,695.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.40 : 18,205.70 = 8,479.13 : x
  2. Step 2: Convert to fraction form
    13,199.40/18,205.70 = 8,479.13/x
  3. Step 3: Cross multiply
    13,199.40x = 18,205.70 × 8,479.13
  4. Step 4: Simplify right side
    13,199.40x = 154,368,363.62
  5. Step 5: Solve for x
    x = 154,368,363.62/13,199.40
  6. Step 6: Final answer
    x = 11,695.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.